I think one of my neighbors is on my wireless network. Unfortunately enabling WEP is not an option (some thing to do with my work). Is there a way to see the IP addresses of everyone on my network? That way I can see if there is anyone I don't want on it.

you should be able to go into your router settings and see. find out what your ip address is (192.168.X.X). you should be able to turn on MAC filtering to reject any other MAC address that is not yours.

you should be able to go into your router settings and see. find out what your ip address is (192.168.X.X). you should be able to turn on MAC filtering to reject any other MAC address that is not yours.

I know that IP addresses change if the power is lost to the router but MAC addresses can never be changed is that correct?

you should be able to go into your router settings and see. find out what your ip address is (192.168.X.X). you should be able to turn on MAC filtering to reject any other MAC address that is not yours.

in About this Mac it says the MAC address under ethernet, does Airport have the same MAC address?

Your mac's ethernet and Airport adapters have two different addresses. When you look at the System Profiler and click on the "Network" line, you'll see all your network interfaces at the top. The one that says "AirPort" is the one you're interested in. The other ones (built-in Ethernet, Firewire) do not apply to the MAC you're going to put into your router.

And why would you want a PM about James Paul McCartney and Richard Starkey? :-)